GNSS and satellite communications coexistence

By monitoring the silent periodic patterns of GNSS in-band interference, the NTN frame cycle boundary was determined, thus solving the communication interruption problem caused by GNSS signal interference and realizing NTN network communication and timing synchronization when GNSS signals are masked.

CN122137441APending Publication Date: 2026-06-02APPLE INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
APPLE INC
Filing Date
2025-12-01
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In-band GNSS interference may prevent equipment from receiving GNSS signals and/or from communicating with NTN, P2P networks or other independent networks, resulting in positioning, time estimation and velocity estimation failures.

Method used

By monitoring the silent periodic patterns in GNSS in-band interference signals, the NTN frame cycle boundary is determined, and communication is carried out using NTN signals embedded in the silent period when GNSS signals are masked, with timing synchronization achieved using an external clock.

Benefits of technology

Even when GNSS signals are interfered with, it can still effectively communicate with the NTN network to achieve positioning and time synchronization, thus improving the operational performance of the equipment in the NTN network.

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Abstract

This disclosure relates to the coexistence of GNSS and satellite communications. Electronic devices can communicate with an NTN using an external clock from a non-terrestrial network (NTN). The electronic devices can determine the external clock used for communication with the NTN. The devices can receive indication of the external clock from a Global Navigation Satellite System (GNSS) or from jamming signals. Jamming signals can at least partially mask GNSS signals. Nearby devices may be using an external clock to transmit jamming signals to the NTN. Nearby devices can embed each frame cycle of the external clock into a predetermined pattern of silence periods or transmission gaps. The electronic devices can determine the relationship (e.g., duration offset) between the silence period in the predetermined pattern of silence periods and the frame boundaries of the frame cycle of the external clock. Therefore, the electronic devices can communicate with the NTN even though GNSS signals are masked.
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